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youtube
Add a custom subscribe button
You can use a branding watermark to embed your channel logo across all videos on your channel. When you add a watermark, viewers can directly subscribe to your channel if they hover over the watermark when using YouTube on a computer. It won't show to users who are already subscribed to your channel.
To feature a video or playlist, use the instructions for featured content.
Availability
- The channel watermark is currently available in landscape view on mobile devices and computers.
- Channel watermarks do not appear on custom YouTube chromeless players.
Subscribe to our YouTube Help channel to get the most out of YouTube. 
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最后更新：2017-05-23 03:59:35